Fruit juice extractor



u2 sheets-sheet 2 Filed uarcn 20;y 1957 along line III-III of Fig. 2;

Patented July 22, 1941 n l A 'j' 2,249,817 y i;

.UNiTEpsj STATES PAiiENTY OFFIC I ravir JUICE Exraiic'roa y Herbert'Fromm, Hamburg, Wis. .l n applicati@ Marengo, v19:r1,vseiiiiim. 132.111

i t claims. My invention relates to fruit juice extractora and has particular reference to a `machine'for extracting and separating fruit Juices from pulp t l andpeel, particularly of citrus fruits t `In fruit juice extractorsitis .common practice to employ a DOWer driven reamer adapted to reamhalf oranges and otherl citrus fruits by 1e invention;

rotary motion of the reamer against the cutv e section of the half fruit. Such reamerstear the ,membranes of thefruitand disrupt the juice sacs, liberating the juiceA therefrom butat` the same time the tornmembranes and some por` tion of the albidoare extracted and fall with the uJuice, `requiring Vthat the extracted juice be strained from the debris befo'reritvcan` be used.

Also thereamers frequentlytear out wholefjuice sacs without disrupting thesameand such juice l sacs will not pass through the strainer, causingr considerable loss of juice from the fruit.

It istherefore an object of my invention to provide a juice extractor of thereamertype in which a strainer is disposed immediately below `the reamer for the purpose of catching the juice, pulp, membranes and albido portions and "in Ywhich the strainer is so constructed and operated as to tend to tear any disrupted juice sacs, fur- Ather liberating the` juice from theA debris.

,- Another object of my invention is to provide a fruit juice extractor of the character set forth in the preceding paragraph wherein the strainer is mounted upon the machine for oscillatory movement, producing a shaking or jarring of the `separation of the Juice' from the debris.

Another object of my invention 'is to provide a fruit juice extractor of the character set forth wherein a single operating shaft is employed i to rotate the reamer'and to impart an oscillatorymotion to the strainer.` 1 e 4 Other objects and advantages of my invention will be apparent from a study of the following specifications, read in connection 'with them accompanying drawings, wherein Fig. 1 is a vertical elevational view of a fruit extractor constructed in accordance with my invention;

Flg.2 is a vertical sectional view taken along line II-II of Fig. 1; y. Y f Fig. `3 is a horizontal sectional :view taken rig. 4 is a detaii sectional view through the power shaft and oscillating mechanismv taken` along line IV--IV of Fig. 3; Fig. 5 is s. detail plan view or the strainer 65 with i. iis-s) which may be employed the practice of Vmy Fig; 6"is a detail fragmentary view of a portion of the strainer illustrated in Fig. 5, showing one `of the straineropenings and the projections thereon; and

Fig. 'Il isa detail fragmentary sectional view oi'A a portion ofthe strainer taken along line` VIIVII 0f Fig. 6. i i

i Referring to the drawings, I have illustrated fa fruit` juice lextractor as comprising 's'. suitable Vcasing nl which is'` preferably hollowfand is adapted to constitute a housing for amotor `2 by which the mechanism of thev extractor is operated. The housing l is'preferably provided with a base portion 3 adapted to nest upon a table or other suitable surface and preferably having foot pieces I attached thereto.

By referring particularlyv to Fig. 2e, it will be observed thatthe upper portion `olf-*the casing I is provided with anoverhanging annular flange portion l which-"provides a lip beneath which maybe formed a plurality of ventilation openings by. which air may enter or leave the casing to assist in the cooling of themotor 2. The

extremeupper end of the casing i ares outwardly as indicated at 1 to form the contents of the strainer lto further assist in a bowl-receiving chamber l in whichseats a bowl l of metal or other suitable material adapted to receive the `Juices extracted and to pass them out of the machine through a spout It` extending through a suitable opening Il in the flared upper endI of the casing i. Immediately below the yilared upper end I of the casingis a partition I2 which may be vformed integrally ,with the casing I and which constitutes amounting plate by which the motor 2 maybe rigidly secured within the casing' as by means fof screws I3 pass- `trai bore Ii ingfthrough the mounting plate or partition i! and into suitable upstandingbosses i4 on the motor.

The mounting plate l! is through which extends the motor shaft Il, the upper end of whichy is provided with a tip I1. either formed integrally with the motor shaft I l or attached thereto as byl screw orpinli, which constitutes the clutch supporting the reamer Il vand connects the reamer i9 for rotation with the motor shaft It. The reamer i9 may be of anysuitable constructiomeither metal or vitreous material such as are ordinarily used in machines Vof this characterand is preferably constructed as a dome-like member having a central downwardly depending boss 20 provided an interior bore 2l of such shape as to conprovided with a cen- V j nnmediatuy below Ythe by which rotary force is transmitted from the shai't I.'| to the reamer.

By reasonof this construction the reamer may be dropped upon the motor shaft while the motor is running and will be guided into its proper seating relation upon the tip I1 without injury either to the clutch or `squared portion 23 or the interior of the bore 2|.

l It will be noted that the' reamer is not permanently attached to the motor shaft; but is vremovable tov facilitatey cleaning of the machine and the reamer.A r.

reamerIS is. mounted a strainer 24, preferably of relativelyshallowdishshape and preferably formed of metal having a plurality of openings 25 and 26 distributed throughout the surface of the strainer. The op- ,V enings 25` are preferably curvilinear cuts made through the material of the strainer and prefer- 'ably extend from a point adjacent the periphery of the strainer'to a point approximate the lowermostlevel of the dish-shaped strainer.,- The openings. 26VV are preferably substantially circular f in shape and extend vertically through the material of the strainer, such openings being formed .in any suitable' manner as by stamping, in such manner as to produce a shape suchkas `that shown la'tVZ'I to'iorm an upwardly extending projection against which Juice sacs and debris will impact when the strainer is oscillated as hereinafter describedf .I f yThe lstrainer'v 24 is provided with a central "opening 28 which may be formed by cutting out the metal at the center of the strainer and per- 1 mltting the attachment of a hub 29 thereto or the hub 29 may be formed integrally with the strainer 24 if' desired.v The hub 29 extends upwardly and has 'a central bore 30 adapted to receive and engage the squared upper end 3I of a bushing 32 which is adapted t'ofsurroundthe motor shaft I6 butwhich is free of the shaft to permit relative rotation therebetween.A In order to-hold the strainer rigidly secured to the bushing 32,`I vprefer to provide a key slot 33 extending from theyupper end of the bushing to viding a space therebetween for the reception of a hook-like end 40 of a lever 4I. the opposite end of which is pivoted as at 42 upon a screw 43 received in a boss 44 on the motor frame. a bushing 45 being interposed between the screw 43 and the lever 4I if desired for the purpose of reducing friction therebetween. The lever v32 extends across the .path of'movement of the roller bearing 38 'so that as the 'roller bearing moves in its reciprocatory or eccentric path the outer hooked end (of the lever) 40 of the lever 4| will be'moved through an oscillatory path and will 'bushingto be retracted in the counterclockwiser cause the bushing 32 tovbe moved through an os-4 noted that the lever 4| swings the bushing 32 in.

a'clockwise direction and in order to cause the direction, I .prefer-`to'provide a relatively heavy spring 46, one end of which is secured to an outstanding ear4`| on thebushing 32 as indicated at 48, while the opposite end of the spring 46 is secured as by means of' a pin or screw 49to the frame of the motor 2.

It will be noted that the clockwise movement Aof the strainer Vwill move the projections 21 of the openings. 26 against-the juice sacs or debris which is inthe strainer, while in the reverse movement .ofv the strainer the debris -will be forced rearwardly against the projections when the strainer comes to rest in its rearward or in Figs. 6 and V7,wherein.the material at oneslde of the opening 126'jisistruck upwardly as indicated counterclockwise motion as the lever `4I again contacts the bearing 38.

It will lbe observedA from Fig. 2 that the hub 29 of the strainer-is provided with a channel 50' into which projects an upwardly extending .flange 5Iy formed upon the lower portionof Athe bowl 9, thus effectively avoiding the leakage of juice from the bowl to the bushing 32 and to the motor 2 located below it. Also if desired a cuplike bushing 52 may be provided upon the busha considerable distance down along the bushing and adapted to receive a set screw or clamping screw 34 extending through the hub 29 and adapted to be'manipulated to clamp the strainer 24rigidly to the bushing 32.

Y,Oscillatory motion is imported to the strainer 24 through the-bushing 32as is best illustrated yeccentric 39 to impart a reciprocatory motion or an eccentric motion to the outer surface of the roller bearing 38. The ears 36 and 31 are spaced ing'32 to extend about an upstanding flange- 53 formed upon the motor-supporting plate or partition I2 to thus further prevent leakage of the juices into the motor and the oscillating mechanism mounted above it.V

. The bushing32 may be loosely mounted upon the motor shaft I6 though I prefer to support thesame in ball bearings, as indicated in Fig. 4, wherein the bushing is illustrated as having a relatively large central bore 54, near the upper end of which isseated a ball bearing 55 engaging the interior of the bushing 32 and the exterior of the motor:shaft I6 while the enlarged lower end 35 of the bushing32 is likewise provided with Ya ball bearing 56 engaging the shaft I6 and the bushing 32.

Also it will be noted from Fig. 4 that the eccentric 39 is keyed or otherwise fixed .to the shaft I6 as by a keyway 5l on the shaft I6 into which projects a set screw 58.

It will also be noted that the upper end of the bowl 9 may be formed with an upstanding flange 59 adapted to form a seat 60 into which the lower edge of a substantially semi-spherical hood 6I may rest, the hood 6I being secured 4to the bowl 9 by means of a bayonet-,and slot joint indicated at 62. AThe hood 6I, of course, will be provided with an opening 63 through which access to the reamer may be had.

one above the other as indicated in Fig. 2 pro- 75 With the machine assembled as hereinbefore described, the operator of the machine may place a half orange or other fruit through the opening 63 of the hood 6I and press it upon the `reamer I9. The motor 2 operating at a relatively high speed will rotate the reamer I9, causing the reamer to extract or tear the membranes described imparts an oscillatory movement to the strainer 24 which, as the debris and juice falls upon it, will quickly and completely separate the juice from the debris, the debris 'being held in the strainer while the juice falls through the yopenings 25 yand 26 to the interior of the said reamer, means mounting said strainer for oscillatory movement about an axis concentric with the rotation of said shaft, an eccentric on said shaft, a spring urging said lstrainer in one direction relative to said `shaft and a lever engaging said strainer and said eccentric for moving said strainer in the opposite` direction upon each rotation of said shaft.

upper end of said shaft, a strainer disposed below said reamer, means mounting said strainer relative to said shaftfor oscillatory movement relative thereto, an eccentric on said shaft, a boss extending from said motor in a direction parallel to said shaft and in spaced relation thereto, a

. lever having one of -its ends pivoted to said boss :and the other of its ends engaged with said strainer-mounting means, said lever being disposed 'relative to said shaft to be engaged by said eccentric whereby rotation of said shaft will move said lever -tooscillate said strainer, a second boss on said motor extending parallel with said shaft, and a spring interconnecting said last named boss and said strainer mounting means to normally urge said strainer in one direction. 4. In a fruit juice extracting and straining ap- .pliance in combination, a motor mounted at a relatively low level in said appliance, a rotary 2. In a fruit juice extractor, arnotor, means being disposed relative to said shaft to be engaged by said eccentric whereby rotation of said shaft `will `move said lever to oscillate said strainer.

3. In a fruit juice extractor, a motor, means mounting said motor with the shaft thereof extending vertically, a reamer secured upon the Atoward* the lever.

juice extractor spaced above said motor, a motor driven shaft extending from the motor upwardly to said-extractor for rotating the latter in a constant. direction, an oscillatory juice strainer supported for operation below said extractor, an actuator carried by said shaft between said motor and said strainer, and a power transmittingvdevice mounted to reciprocate in a plane transverse the axis of said shaft intermediate the ends'of said shaft and constructed and arranged to convert rotary movement of said actuator into oscillatory movement of said strainer.

`5. In a fruit juice extractor, a shaft rotatable about a vertical axis, a reamer secured upon the upper end of such shaft, a strainer disposed below the reamer and secured to a bushing, means mounting the bushing on the shaft for rotation relative thereto, an eccentric carried by said shaft, a lever pivotally constrained at one end by a ilxed pivot and disposed to contact the periphery of the eccentric,connecting means for transmitting motion from the free end of the leverk to an outer portion of the bushing, whereby rotation of the eccentric with the shaft periodically causes partial rotation of the strainer, and

HERBERT FROMM. 

